Other emergency professions such as police officer and firefighters are perfectly fine being vocational because the tasks they perform can not truly be taught in a classroom. It needs to be learned by experience. Medicine is a science and needs to be learned in a classroom and furthered with experience. We do it the complete opposite.
Beleive me, while it is easy to simply answer the question as it was posed here, the reason I didn't is because I already see that as this person has more unrelated facts heaped onto his shoulders to memorize, they will all get confused and there will be some very bad testing experiences in the future.
While the "quick way now" seems like a reasonable solution to this chapter, wrote memorization at any level of medicine will not overcome base knowledge deficit.
Taking extra time to learn things right will not only help pass tests in the future, it will make for better patient care.
Anyone who has been to school for any length of time can tell you sometimes you have to take responsibility for yourself to overcome a poor instructor. (Not just in EMS schools)
I offered the best long term solution.
I picked that specific book for this thread because of the way it is written. It assumes you know nothing about chemistry or biology, and explains it to you step by step in an easy to understand, easy to read way. (with pictures)